US2756959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-pressure responsive sphincter valve
Assignee: GLOBE Co
•
Filing: 1951-07-25
•
Granted: 1956-07-31
•
Expires: 1971-07-25
Abstract
No abstract record available.
Inventors
- 👤 John W Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:05
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US614968A
Cited
US2247363A
Cited
GB540685A
Cited
US2487226A
Cited
US2573712A
Cited
US2587188A
Cited
US2518625A
Cited
US2590215A
Cited
US2575240A
Cited
US2604246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |